| as a source of energy | 3 | purpose |
| commonly | 2 | degree |
| furnace → be → electric | 34 |
| furnace → have → electric ignitions | 11 |
| furnace → use → electric | 4 |
| negative | neutral | positive |
| 0.288 | 0.653 | 0.059 |
| Raw frequency | 49 |
| Normalized frequency | 0.604 |
| Modifier score | 0.755 |
| Perplexity | 315.447 |